text: ﻿/*
   * SVQ1 decoder
   * ported to MPlayer by Arpi <arpi@thot.banki.hu>
   * ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>
   *
   * Copyright (C) 2002 the xine project
   * Copyright (C) 2002 the ffmpeg project
   *
   * SVQ1 Encoder (c) 2004 Mike Melanson <melanson@pcisys.net>
   *
   * This file is part of FFmpeg.
   *
   * FFmpeg is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * FFmpeg is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with FFmpeg; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   */
  
  /**
   * @file
   * Sorenson Vector Quantizer #1 (SVQ1) video codec.
   * For more information of the SVQ1 algorithm, visit:
   *   http://www.pcisys.net/~melanson/codecs/
   */
  
  #ifndef AVCODEC_SVQ1_H
  #define AVCODEC_SVQ1_H
  
  #include <stdint.h>
  
  #define SVQ1_BLOCK_SKIP         0
  #define SVQ1_BLOCK_INTER        1
  #define SVQ1_BLOCK_INTER_4V     2
  #define SVQ1_BLOCK_INTRA        3
  
  struct svq1_frame_size {
      uint16_t width;
      uint16_t height;
  };
  
  uint16_t ff_svq1_packet_checksum (const uint8_t *data, const int length,
                                    int value);
  
  extern const int8_t* const ff_svq1_inter_codebooks[6];
  extern const int8_t* const ff_svq1_intra_codebooks[6];
  
  extern const uint8_t ff_svq1_block_type_vlc[4][2];
  extern const uint8_t ff_svq1_intra_multistage_vlc[6][8][2];
  extern const uint8_t ff_svq1_inter_multistage_vlc[6][8][2];
  extern const uint16_t ff_svq1_intra_mean_vlc[256][2];
  extern const uint16_t ff_svq1_inter_mean_vlc[512][2];
  
  extern const struct svq1_frame_size ff_svq1_frame_size_table[7];
  
  #endif /* AVCODEC_SVQ1_H */
  